Numbers k such that k^2 is centered hexagonal.
A001570
Numbers k such that k^2 is centered hexagonal.
Terms
- a(0) =1a(1) =13a(2) =181a(3) =2521a(4) =35113a(5) =489061a(6) =6811741a(7) =94875313a(8) =1321442641a(9) =18405321661a(10) =256353060613
External references
- oeis: A001570